Do not block on sending metrics

[ReneKroon]

I decoupled writing to the UDP socket from the ticker loop.

Depending on your preference i can:

• add a proper benchmark showing the improvement for this change
• add a synchronized structure so that only one go routine will be sending data

Please let me know what you prefer.

[ReneKroon]

was unable to produce a benchmark which shows a real positive effect of this change. so will close